# JSS

JavaScript authoring tool for CSS that describes styles in JavaScript and compiles them in the browser, on the server or at build time.


Source: https://findsoftware.frbit.cloud/jss/
Last reviewed: 2026-10-27
Updated: 2026-10-28
Listed since: 2026-10-27

## Record

### Links

- home: https://cssinjs.org
- repository: https://github.com/cssinjs/jss
- docs: https://cssinjs.org
- discord: https://discord.gg/e79XhqmaDH
- forum: https://github.com/cssinjs/jss/discussions

### Identity

- status: discontinued
- maintainer: Oleg Isonen
- maintainerType: unknown
- parent: unknown
- firstRelease: 2014
- hqCountry: unknown

### Kind

- category: css-framework
- hosting: not applicable
- language: javascript
- runtime: unknown
- runtimeMin: not applicable
- basedOn: unknown

### Content

- contentStore: not applicable
- databases: not applicable
- adminUi: not applicable
- headlessApi: not applicable
- templating: not applicable
- i18n: not applicable

### Rendering and deploy

- runsAs: browser, local
- renderingModes: not applicable
- installMethod: yarn

### License

- licenseModel: open-source
- license: MIT

### Releases

- currentMajor: 10
- latestReleaseDate: 2024-05-14

### Adoption

- githubStargazers: 7044
- packagistDownloads: not applicable
- npmWeeklyDownloads: 3201523
- contributors: 128
- pluginCount: unknown
- packagistMonthlyDownloads: unknown
- ecosystemsMonthlyDownloads: unknown
- httpArchiveSites: 37513
- wordpressActiveInstalls: unknown
- dependentRepos: 290512
- dependentPackages: 1021

### Sources

- status: https://github.com/cssinjs/jss/blob/master/readme.md (read 2026-10-27)
- urls: https://api.github.com/repos/cssinjs/jss (read 2026-10-27)
- urls: https://api.github.com/repos/cssinjs/jss (read 2026-10-27)
- urls: https://github.com/cssinjs/jss/blob/master/readme.md (read 2026-10-27)
- firstRelease: https://api.github.com/repos/cssinjs/jss/git/refs/tags/0.2.1 (read 2026-10-27)
- maintainer: https://raw.githubusercontent.com/cssinjs/jss/master/LICENSE (read 2026-10-27)
- language: https://api.github.com/repos/cssinjs/jss (read 2026-10-27)
- category: https://api.github.com/repos/cssinjs/jss (read 2026-10-27)
- installMethod: https://github.com/cssinjs/jss/blob/master/docs/setup.md (read 2026-10-27)
- installMethod: https://github.com/cssinjs/jss/blob/master/docs/setup.md (read 2026-10-27)
- runsAs: https://github.com/cssinjs/jss/blob/master/docs/intro.md (read 2026-10-27)
- license: https://api.github.com/repos/cssinjs/jss (read 2026-10-27)
- licenseModel: https://raw.githubusercontent.com/cssinjs/jss/master/LICENSE (read 2026-10-27)
- currentMajor: https://api.github.com/repos/cssinjs/jss/releases (read 2026-10-27)
- latestReleaseDate: https://api.github.com/repos/cssinjs/jss/releases (read 2026-10-27)
- githubStargazers: https://api.github.com/repos/cssinjs/jss (read 2026-10-27)
- contributors: https://api.github.com/repos/cssinjs/jss/contributors (read 2026-10-27)
- npmWeeklyDownloads: https://api.npmjs.org/downloads/range/2026-09-28:2026-10-04/jss (read 2026-10-28)
- dependentPackages: https://packages.ecosyste.ms/api/v1/registries/npmjs.org/packages/jss (read 2026-10-27)
- dependentRepos: https://packages.ecosyste.ms/api/v1/registries/npmjs.org/packages/jss (read 2026-10-27)
- httpArchiveSites: https://cdn.httparchive.org/v1/technologies (read 2026-10-27)

## Notes

JSS is an authoring tool for CSS: styles are described in JavaScript and compiled into style sheets in the browser, on the server or at build time in Node. It is installed with yarn or loaded from the unpkg CDN, and its [documentation](https://cssinjs.org) is on the project's own site. The source is in the cssinjs organization on GitHub, and Oleg Isonen is named in the copyright line of the license.

## Worth knowing

The README states that the project is no longer maintained. Its maintainer says they are working on a new tool, Webstudio, which the README links.

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Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Attributes are recorded, never scored; absent means unknown.
Credit, in full: FindSoftware, CC BY 4.0